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Taiwan Semiconductor Corporation SK55C R7G
- Part No.:
- SK55C R7G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SK55C R7G.pdf
- Description:
- DIODE SCHOTTKY 50V 5A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,461
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Product details
Overview
SK55C R7G from Taiwan Semiconductor is a 5A, 50V Schottky barrier surface-mount rectifier in DO-214AB (SMC) package, optimized for high-efficiency switching power supplies with low forward voltage (0.75 V at 5 A, 25°C) and high surge capability (120 A). It serves as the primary output rectifier in AC/DC adapters and DC/DC converters.
For engineers reviewing the SK55C R7G datasheet, SK55C R7G pinout, SK55C R7G application, or SK55C R7G equivalent, key selection criteria include its 50 V repetitive peak reverse voltage, 13 °C/W junction-to-lead thermal resistance, moisture sensitivity level 1 rating, and RoHS/halogen-free compliance for automated SMT assembly.
Technical Context
The SK55C R7G employs a single-die Schottky structure with guard ring overvoltage protection, enabling stable operation up to 150°C junction temperature. Its low VF minimizes conduction loss in high-frequency SMPS topologies where efficiency and thermal management are critical.
Designed for unidirectional current flow, it features a cathode band polarity indicator and meets JESD201 Class 2 whisker resistance. The device operates within -55°C to +150°C storage and junction temperature ranges, with 10,000 V/µs critical dV/dt rating ensuring robustness against fast transient voltages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in flyback/freewheeling paths |
| IF | 5 A - Continuous forward current rating; supports typical 25–65 W adapter output stages |
| VF @ 5A, 25°C | 0.75 V - Low conduction loss reduces heat generation and improves system efficiency |
| IFSM | 120 A - Peak non-repetitive surge current handling for startup/load-dump transients |
| RθJL | 13 °C/W - Enables effective heat transfer to PCB copper pad, supporting compact thermal design |
| TJ max | 150 °C - Maximum junction temperature; allows operation in enclosed or high-ambient environments |
| IR @ 50V, 25°C | 0.5 mA - Low leakage preserves efficiency in standby and light-load conditions |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, polarity indicated by cathode band. Weight: 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current entry point | Connected to switch node or transformer secondary; must withstand peak reverse recovery stress |
| Cathode | Output current exit point | Connected to output capacitor and load; carries full DC output current with minimal drop |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances voltage ruggedness and prevents premature edge breakdown under transient overvoltage |
| Moisture sensitivity level 1 | Eliminates bake requirement before reflow, reducing manufacturing cost and process complexity |
| High surge current capability (120 A) | Withstands repeated inrush and fault currents without degradation in adapter and converter applications |
| RoHS and halogen-free compliance | Meets global environmental regulations and enables use in consumer electronics with strict material declarations |
Applications
| AC/DC Adapters | LED Drivers |
|---|---|
Use Scenario: 12–24 V, 3–5 A output stage in wall-mounted USB-C PD adapters. IC Role / Device Role / Timing Role: Output rectifier converting high-frequency transformer secondary AC to regulated DC. Use Value: 0.75 V VF reduces conduction loss by ~15% vs. comparable 60 V Schottkys, improving thermal margin at full load. | Use Scenario: Constant-current LED string supply in commercial downlights with 36–48 V output. IC Role / Device Role / Timing Role: Freewheeling diode in buck-based constant-current regulator. Use Value: 150°C TJ max and 13 °C/W RθJL allow reliable operation in thermally constrained aluminum-core PCBs. |
| DC/DC Converters | Industrial Power Modules |
Use Scenario: Secondary-side rectification in isolated 48 V input telecom DC/DC modules delivering 12 V/5 A. IC Role / Device Role / Timing Role: Synchronous rectifier replacement in medium-power isolated flyback or forward converters. Use Value: Low IR (0.5 mA @ 25°C) maintains regulation accuracy during light-load burst-mode operation. | Use Scenario: Auxiliary power supply rectification in programmable logic controller (PLC) backplane modules. IC Role / Device Role / Timing Role: Input rectifier for internal 5 V/3.3 V bias rails derived from 24 V field supply. Use Value: J-STD-020 Level 1 rating and JESD201 Class 2 whisker resistance ensure long-term reliability in industrial reflow cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS55-E3/57T | Same 50 V VRRM, 5 A IF, but VF = 0.72 V (typ) at 5 A; slightly lower RθJA (50 °C/W vs. 53 °C/W) | Identical DO-214AB footprint; used in same adapter designs but with tighter thermal budget | Select SS55-E3/57T when marginal thermal headroom exists and sub-0.73 V VF is required |
| MBR550RLG | 50 V VRRM, 5 A IF, VF = 0.79 V (max) at 5 A; higher IR (1.0 mA @ 50 V, 25°C) | DO-214AB package; common in automotive body electronics due to AEC-Q101 qualification | Choose MBR550RLG only if AEC-Q101 compliance is mandatory; otherwise SK55C R7G offers better efficiency |
Compared with SS55-E3/57T and MBR550RLG, the SK55C R7G delivers a balanced trade-off of low VF (0.75 V), industry-standard thermal performance (RθJL = 13 °C/W), and Level 1 moisture sensitivity-making it optimal for high-volume consumer power supplies where cost, efficiency, and manufacturability are prioritized.
Availability
SK55C R7G is available at Aetrix Electronics and suitable for AC/DC adapters, LED drivers, and DC/DC converters requiring stable component supply, consistent parametric performance, and full traceability across production lots.
Supply support for SK55C R7G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global power electronics markets since 1979.
The SK52C–SK520C family is engineered specifically for high-efficiency, surface-mount switching power conversion-emphasizing low VF, high IFSM, and robust thermal performance in standard SMC packages.
FAQ
What is the maximum junction temperature rating for the SK55C R7G?
The SK55C R7G has a maximum junction temperature (TJ max) of +150°C, verified per absolute maximum ratings in the official TSC datasheet Version S2311. This rating allows continuous operation in thermally demanding environments such as enclosed power adapters or industrial control modules where ambient temperatures exceed 70°C. Derating curves confirm usable current capacity down to 2.5 A at 125°C case temperature.
Does the SK55C R7G have a defined pinout or terminal configuration?
Yes-the SK55C R7G is a two-terminal Schottky rectifier in DO-214AB (SMC) package with clearly defined anode and cathode terminals. The cathode is marked by a visible band on the molded body; the anode is the unmarked end. This polarity must be observed during PCB layout to ensure correct current direction and prevent catastrophic failure.
Is the SK55C R7G compliant with RoHS and halogen-free standards?
Yes-the SK55C R7G is fully RoHS compliant and halogen-free, as explicitly stated in the "Features" section of the TSC datasheet Version S2311. These compliance statements are verified through material declarations and third-party testing, supporting use in consumer electronics sold in EU, Japan, and other regulated markets requiring strict substance restrictions.
What is the forward voltage specification for the SK55C R7G at rated current?
The SK55C R7G exhibits a typical forward voltage (VF) of 0.75 V at 5 A and 25°C junction temperature, per electrical specifications in the TSC datasheet. This value is measured under pulse conditions (PW = 0.3 ms), reflecting real-world conduction loss in high-frequency switching applications. At 100°C, VF drops to approximately 0.68 V due to negative temperature coefficient behavior.
How does the SK55C R7G compare to the SK54C and SK56C in terms of voltage rating?
The SK55C R7G is rated for 50 V repetitive peak reverse voltage (VRRM), positioning it between the SK54C (40 V) and SK56C (60 V) in the SK52C–SK520C family. All three share identical current (5 A), thermal (RθJL = 13 °C/W), and packaging (DO-214AB) specifications-only VRRM and corresponding VF/IR values differ. This enables direct substitution in designs where 50 V provides optimal margin over worst-case reflected voltage.
SK55C R7G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AB, SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 750 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 50 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SK55C R7G FAQ
1.How can I place an order for SK55C R7G through Aetrix?
Please submit a Request for Quotation (RFQ) for SK55C R7G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SK55C R7G reliable?
The price and inventory of SK55C R7G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SK55C R7G is usually 5 days.
3.What payment methods are accepted for SK55C R7G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SK55C R7G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SK55C R7G?
SK55C R7G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SK55C R7G order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SK55C R7G?
For technical support, including SK55C R7G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SK55C R7G requirements.
6.How does Aetrix verify that SK55C R7G is sourced from the original manufacturer or authorized distributors?
All SK55C R7G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SK55C R7G meets industry standards.
7.What is the process for return or replacement of SK55C R7G?
All SK55C R7G units undergo pre-shipment inspection (PSI). If there is an issue with SK55C R7G, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SK55C R7G part is unused and in its original packaging.
Return procedure for SK55C R7G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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